There are (from searching) several supplies of cheap, flatpack furniture for landlords, which probably explains why half the properties I rented as a student had the same furniture, made of 5mm thick hardboard and bits of plastic. That stuff didn't even hold together properly when it was new, let alone a couple of years old.
Habitat should be decent quality. MFI used to be a major retailer of flat-pack stuff, but they went bankrupt in 2015. My parents bought almost everything for the kids' rooms from MFI. None of it is broken, 15-25 years later.
That wardrobe's not really a flatpack, though. Last time I looked, Argos's flatpacks were similarly priced to IKEA's, though I haven't really looked in a while.
